In the 3rd edition game mechanics, Constructs are considered one of the major creature types, which are Aberrations, Animals, Constructs, Dragons, Deathless, Elementals, Fey, Giants, Humanoids, Magical Beasts, Monstrous Humanoids, Oozes, Outsiders, Plants, Undead, and Vermin. Within the 3rd edition mechanics, all constructs have 10-sided hit dice; have darkvision; are made from unliving matter; cannot heal damage on their own; are immune to all mind-afflicting spells and abilities; are immune to poisons, sleep effects, paralysis, stunning, disease, death effects, and necromancy effects; are not subject to critical hits, nonlethal damage, ability damage and drains, fatigue, exhaustion, or energy drains; cannot be raised or resurrected; and do not need to eat, breathe, or sleep.